The killer enters Dave's room with the skeleton key and strikes him on the back of his head while he's bent over his drawing. This leaves a small spray of blood and a bloodstain on his desk. The killer then takes an unconscious Dave out of the room to the second or third floor, stabs him repeatedly and severely, and pushes him down the elevator shaft, where he lands face-down.
I see a few points of contention, still - first, that he was so absorbed in his work that he failed to notice anyone coming into his room. Second, there are still no blood stains where they ought to be.
no subject
The killer enters Dave's room with the skeleton key and strikes him on the back of his head while he's bent over his drawing. This leaves a small spray of blood and a bloodstain on his desk. The killer then takes an unconscious Dave out of the room to the second or third floor, stabs him repeatedly and severely, and pushes him down the elevator shaft, where he lands face-down.
I see a few points of contention, still - first, that he was so absorbed in his work that he failed to notice anyone coming into his room. Second, there are still no blood stains where they ought to be.